In March, the pair took bronze at the 2017 Cup of Tyrol before competing at the 2017 World Championships in Helsinki, Finland.

They achieved a personal best short program score, of 59.76 points, but their ranking (nineteenth) was insufficient to advance to the final segment.

They outscored Annika Hocke / Ruben Blommaert by 5.77 points for the bronze medal at the 2017 CS Warsaw Cup in November.

The following month, the pair won silver behind Aliona Savchenko / Bruno Massot at the German Championships, ranking second in both segments and obtaining 4.33 points more than Hocke/Blommaert.

[6] Due to a back injury sustained by Hase, the pair was unable to accept a spot at the 2018 European Championships, which became available after Savchenko/Massot withdrew.

[10][11] After participating at the 2018 Golden Spin of Zagreb and placing fourth,[12] they won their first national title at the 2019 German Championships.

[13] Hase/Seegert took sixth place at the 2019 European Championships,[14] and at the 2019 Challenge Cup they won gold at their first international competition with a new best total score of 185.38 points.

At their second Grand Prix assignment, the 2019 Rostelecom Cup, Hase/Seegert placed fourth in the short program, narrowly behind the new Russian pair of Stolbova/Novoselov.

[22] In the free skate, Stolbova/Novoselov performed poorly, while Hase/Seegert nearly equaled their personal best in the segment, placing fourth again, but third overall due to their short program lead over the Austrian team Ziegler/Kiefer.

"[23] After winning the German title for the second consecutive year, Hase/Seegert were assigned to the 2020 European Championships, where they placed fifth in the short program with a new personal best, breaking 70 points in that segment for the first time.

"[25] This proved to be their final competition for the season, as they had been assigned to compete at the World Championships in Montreal, but these were cancelled as a result of the coronavirus pandemic.

[28] Hase/Seegert were scheduled to compete in the Grand Prix at the 2020 Internationaux de France, but the event was cancelled due to the pandemic.

"[35] After winning their third German national title, Hase/Seegert competed at the 2022 European Championships in Tallinn, finishing eighth.

[37] On February 11, the German Ice Skating Union announced that Seegert had been released from quarantine and would be able to compete.

[38] They placed fourteenth in the short program after Hase fell on her jump attempt, qualifying for the free skate.

As those countries’ athletes comprised the entirety of the top five pairs at the Olympics, this greatly impacted the field.

Seegert initially sought a new partner, but in January 2023 he informed the German Ice Skating Union that he had not been able to find a suitable one, and that he would be retiring from competition.